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Patent
   D460536
Priority
Jun 30 2000
Filed
May 22 2001
Issued
Jul 16 2002
Expiry
Jul 16 2016
Inventors
Renaud, Mi…
Assg.orig
E. I. du P…
Assg.curr
E I DU PO…
Entity
unknown
Referenced by
8
References
5
Maint.:
n/a
The ornamental design for a flexible tube having a variable stiffness bellows, as shown and described.

FIG. 1 is a perspective view of a flexible tube having a variable stiffness bellows showing my new design;

FIG. 2 is a front view thereof, the rear being identical; and,

FIG. 3 is an end view.
INVENTORS:

Renaud, Michel Claude

THIS PATENT IS REFERENCED BY THESE PATENTS:
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11549523, Apr 27 2021 BLACOH FLUID CONTROLS, INC Automatic fluid pump inlet stabilizers and vacuum regulators
11828303, Apr 27 2021 BLACOH FLUID CONTROLS, INC. Automatic fluid pump inlet stabilizers and vacuum regulators
D675721, Jan 13 2011 PEP INNOVATIONS, INC Bellows
D675722, Jan 13 2011 BLACOH FLUID CONTROLS, INC Bellows
D823444, Dec 22 2016 SANKEI GIKEN CO., LTD. Flexible pipe joint
ER1357,
ER2839,
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
1547431,
3050087,
3842865,
6056018, Oct 29 1997 E I DU PONT DE NEMOURS AND COMPANY Variable stiffness bellows
221078,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
May 22 2001E. I. du Pont de Nemours and Company(assignment on the face of the patent)
Aug 13 2001RENAUD, MICHEL CLAUDEE I DU PONT DE NEMOURS AND COMPANYASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0122230505 pdf
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